Vulnerability-Lookup

CNVD-2021-53941

Vulnerability from cnvd - Published: 2021-07-23

Title

Joomla!代码问题漏洞

Description

Joomla!是一套使用在Joomla!内容管理系统中的论坛组件。 Joomla! 2.5.0 - 3.9.27存在代码问题漏洞，该漏洞源于com_installer 中的安装操作缺少对超级用户所需的硬编码ACL检查，攻击者可利用该漏洞执行com_installer 中的安装操作。

Severity

中

Patch Name

Joomla!代码问题漏洞的补丁

Patch Description

Joomla!是一套使用在Joomla!内容管理系统中的论坛组件。 Joomla! 2.5.0 - 3.9.27存在代码问题漏洞，该漏洞源于com_installer 中的安装操作缺少对超级用户所需的硬编码ACL检查，攻击者可利用该漏洞执行com_installer 中的安装操作。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

厂商已发布了漏洞修复程序，请及时关注更新： https://developer.joomla.org/security-centre/859-20210704-core-privilege-escalation-through-com-installer.html

Reference

https://www.cybersecurity-help.cz/vdb/SB2021070701

Impacted products

Name
Joomla! Joomla! >=2.5.0，<=3.9.27

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2021-26038",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2021-26038"
    }
  },
  "description": "Joomla!\u662f\u4e00\u5957\u4f7f\u7528\u5728Joomla!\u5185\u5bb9\u7ba1\u7406\u7cfb\u7edf\u4e2d\u7684\u8bba\u575b\u7ec4\u4ef6\u3002\n\nJoomla! 2.5.0 - 3.9.27\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ecom_installer \u4e2d\u7684\u5b89\u88c5\u64cd\u4f5c\u7f3a\u5c11\u5bf9\u8d85\u7ea7\u7528\u6237\u6240\u9700\u7684\u786c\u7f16\u7801ACL\u68c0\u67e5\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884ccom_installer \u4e2d\u7684\u5b89\u88c5\u64cd\u4f5c\u3002",
  "formalWay": "\u5382\u5546\u5df2\u53d1\u5e03\u4e86\u6f0f\u6d1e\u4fee\u590d\u7a0b\u5e8f\uff0c\u8bf7\u53ca\u65f6\u5173\u6ce8\u66f4\u65b0\uff1a\r\nhttps://developer.joomla.org/security-centre/859-20210704-core-privilege-escalation-through-com-installer.html",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2021-53941",
  "openTime": "2021-07-23",
  "patchDescription": "Joomla!\u662f\u4e00\u5957\u4f7f\u7528\u5728Joomla!\u5185\u5bb9\u7ba1\u7406\u7cfb\u7edf\u4e2d\u7684\u8bba\u575b\u7ec4\u4ef6\u3002\r\n\r\nJoomla! 2.5.0 - 3.9.27\u5b58\u5728\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8ecom_installer \u4e2d\u7684\u5b89\u88c5\u64cd\u4f5c\u7f3a\u5c11\u5bf9\u8d85\u7ea7\u7528\u6237\u6240\u9700\u7684\u786c\u7f16\u7801ACL\u68c0\u67e5\uff0c\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884ccom_installer \u4e2d\u7684\u5b89\u88c5\u64cd\u4f5c\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Joomla!\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Joomla! Joomla!  \u003e=2.5.0\uff0c\u003c=3.9.27"
  },
  "referenceLink": "https://www.cybersecurity-help.cz/vdb/SB2021070701",
  "serverity": "\u4e2d",
  "submitTime": "2021-07-07",
  "title": "Joomla!\u4ee3\u7801\u95ee\u9898\u6f0f\u6d1e"
}

CVE-2021-26038 (GCVE-0-2021-26038)

Vulnerability from cvelistv5 – Published: 2021-07-07 10:12 – Updated: 2026-02-25 05:04

Title

[20210704] - Core - Privilege escalation through com_installer

Summary

An issue was discovered in Joomla! 2.5.0 through 3.9.27. Install action in com_installer lack the required hardcoded ACL checks for superusers. A default system is not affected cause the default ACL for com_installer is limited to super users already.

Severity

No CVSS data available.

CWE

CSRF

Assigner

Joomla mitre root

References

1 reference

URL	Tags
https://developer.joomla.org/security-centre/859-…	x_refsource_MISCvendor-advisory

Impacted products

1 product

Vendor	Product	Version
Joomla! Project	Joomla! CMS	Affected: 2.5.0-3.9.27

Date Public

2021-07-06 00:00

Show details on NVD website

JSON

To clipboard

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              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://developer.joomla.org/security-centre/859-20210704-core-privilege-escalation-through-com-installer.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Joomla! CMS",
          "vendor": "Joomla! Project",
          "versions": [
            {
              "status": "affected",
              "version": "2.5.0-3.9.27"
            }
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      "providerMetadata": {
        "dateUpdated": "2026-02-25T05:04:44.258Z",
        "orgId": "6ff30186-7fb7-4ad9-be33-533e7b05e586",
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      },
      "references": [
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          ],
          "url": "https://developer.joomla.org/security-centre/859-20210704-core-privilege-escalation-through-com-installer.html"
        }
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      "title": "[20210704] - Core - Privilege escalation through com_installer",
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      },
      "x_legacyV4Record": {
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          "ASSIGNER": "security@joomla.org",
          "DATE_PUBLIC": "2021-07-06T16:00:00",
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          "STATE": "PUBLIC",
          "TITLE": "[20210704] - Core - Privilege escalation through com_installer"
        },
        "affects": {
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.